Improvement in clock-calendars



A. FRAN KFELD.

Cloak-Calendars.

No. 143,618. uPatented 0m. 14, 1873.

f la @/g @www UNITED STATES PATENT EEIGEo ARNOLD FRANKFELD, OF NEV YORK, N. Y.

IMPROVEMENT IN CLOCK-CALENDARS.

Speciiication forming part of Letters Patent No. 143,618, dated October 14,1873; application tiled April es, 1873.

To all whom it may concern:

Be it known that I, ARNOLD FEANKEELD, of the city and State of NewV York, have in- Vented an Improvement in Oalendar- Glock Movements, of which the following is a specilicatiOn:

This movement is adapted to communicate motion from a clock to the dials or hands that denote the day of the month and the month of the year, either alone or in connection with the day ofthe week. A propelling-tooth, revolved once in twenty-four hours, is employed to turn a wheel having thirty-one teetha tooth each day. Upon this wheel, called the month-wheel, is a pinion that is turned one tooth a month by a star-wheel that comes into contact with a stop. This pinion gears into a wheel having forty-eight teeth. The spaces between are of uniform width, but of various depths. This wheel represents the months in four years, and is called the year-wheel; and a lever-dog upon the month-wheel has a pin entering the spaces ot the year-wheel, and according to the depth ofthe space, so the lever-dog will project more or less. Then the month has thirty-one days the space is shallow and the lever-dog is kept out ofthe way. Then there is but thirty days in the month the space, being deeper, allows the lever-do g to project farther, and the monthwheel is turned two notches, one by the propelling-tooth and the other by a second propelling-tooth taking against the end of the lever-dog. W'ith the month of February there are either two or three teeth turned, according to whether the month has twenty-eight or twenty-nine days. Thereby the year-wheel upon leap-year has a notch for February that is not as deep as that for the same month in the other three years represented on the said wheel.

In the drawing, Figure l is an elevation of the mechanism with. the parts in position for moving from 28th February to 1st March. Fig. 2 is a similar view with parts in position for moving from April 30th to May lst; and Fig. 3 is a side elevation of the mechanism; and Fig. 4 shows the leverdog and parts behind as if the wheels were removed at the line @c 5c, Fig. 3.

The propelling-tooth a is upon a shaft which is revolved once in twenty-four hours by any suitable clock-movement. The teeth b is on the same shaft, but behind the tooth a, and in a different plane, so as to revolve clear of the teeth of the month-wheel c that is upon the stud cl, and has thirty-one teeth, which, for convenience, are numbered consecutively on the drawing. The year-wheel c has fortyeight teeth and intermediate notches, and this is turned one tooth a month by a pinion and starwheel, i, that takes into contact with the lixed stop k, once each revolution, and turns the year-wheel c onetooth at the time that the pin c on the lever-dog r is lifted out of that notch by the iixed cam n. This lever-dog fr has its fnlcrum upon the month-wheel c, and a spring, l, throws the end ofthe lever-dog out as far as permitted by the depth of notch. The springs u and o, with double-inclined ends, hold the wheels c t' at the points to which they may be turned.

lt will now be understood that the tooth a is to be set to change the calendar from one day to the next at twelve oelock at night 5 and, it' all the months were of equal length, the provisions herein described would not be required, and the record by the dials and hands would be continuously operative; but when the month oi' February contains only twfenty-eight days the propelling-tooth a moves the tooth 2S along and brings 29 into position, and the propelling-tooth b is in position to take against the end of the lever-dog r, and as the clockworlr continues to move the month-wheel will be turned around two notches to bring the tooth l into position to be acted upor by the tooth a the next night, and hence the hand will be moved in the one night from the 28th day of the month to the lst, and the dial or hand that indicates the next month will be moved to March 5 and this will be the case with all the months of the four years. The tooth b, actin at the end ot' the lever-dog, will move the gearing one, two, or three teeth additional, according to the number of days in the month, so as to turn the wheel c completely once in each month, the month-notches in the wheel c being of three depths to allow the end of i to project more or less, the shallowest allowing the movement from 3i) to l, the next depth from 29 to l, and the deepest notch causingv the lever-dog` 1* to project suiiiciently for the tooth b to move the Wheels from 2S to l.

It is to be understood that any suitable indi eating-dials are to be employed. For instance, the days of the Week Will be indicated successively by a connection from the tooth a or other part of the eloek. The days of the month may be indicated upon the dial by a hand on the arbor of the month-Wheel 0,- and the months themselves will be indicated by a dial or hand that is moved forward, by a ratchet or otherwise, one diw'sion at a time, by a stud or other connection to the month-Wheel, that is operative at the change between 3l and l, and this, 

